Wemos Matrix LED Shield, Wemos Full Color RGB Shield (WS2812B), 4-Digit 7-segments LED Display Tube

In this post I will introduce 3 led based displays.

Matrix led shield for Wemos Mini D1

Hardware setup

This shield uses two data pins
D5 = CLK
D7 = DIN

It has 8x8=64 red led

From code you can light any led with x and y coordinates, and set brightness with 8 steps.

Software setup

You will need library from Wemos. That is not in Arduino library manager so you have to download it from Git
https://github.com/wemos/WEMOS_Matrix_LED_Shield_Arduino_Library
For information on installing libraries, see: http://www.arduino.cc/en/Guide/Libraries

Code example

In this example leds go out and with every line they go brighter.

Links

https://wiki.wemos.cc/products:d1_mini_shields:matrix_led_shield

RGB led Shield for Wemos Mini D1

With this shield you can generate  16777216 different colors.

Hardware setup

It needs 5v and D2 as data line.

Software setup

You need to install Neopixel library
https://github.com/adafruit/Adafruit_NeoPixel
or from Library manager

For information on installing libraries, see: http://www.arduino.cc/en/Guide/Libraries

Code example

Links

https://wiki.wemos.cc/products:d1_mini_shields:ws2812b_rgb_shield

4-Digit 7-segments LED Display Tube

There are different versions where is Clock dots, or decimal dots.
In this example i have clock version.

Hardware setup

This Module uses two data pins
D6 = CLK
D5 = DIO

Works both 3.3V and 5.0V

Software setup

There might be several libraries that works with this module, but i have used this simple library
https://github.com/avishorp/TM1637
For information on installing libraries, see: http://www.arduino.cc/en/Guide/Libraries

Code example

In this example:

- Show number with and without leading zeros

- Show Time

- Show brightness setting (8 levels)

- Show setting individual segments, and all possible combinations (128 pcs.).

Links